Update delivery_causality_workflow and related workflows so that no workflow method is called when the transition doesn't exist for the current state.
Also update permissions of states so that they are consistent with the workflow logic: make "building" and "solving" non-editable.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27840 20353a03-c40f-0410-a6d1-a30d3c3de9de